<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>
<body>
    <div id="app">
    <button @click="hundle">修改数据</button>

        <ul>
            <li v-for="value,key in person" >{{key}}--{{value}}</li>
        </ul>
    </div>
    <script>
        Vue.config.productionTip = false;
           
        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    person:{
                        name:'wjy',
                        age:25,
                        skill:"kill"
                    }
                }
            },
            methods: {
                hundle(){
                    this.person.skill = null
                    // console.log(this);
                }
            },
        })
</script>
</body>

</html>